Thanks for the link to the tutorial. About your former proposal, the subject is nearly the same, but this one brings a new approach:
• The profile’s editor would be part of ViewPoint. ViewPoint has no longer improvements, and its interest (as an independent application) decreases with the new version of the Nik Collection.
• The profile’s editor would be also used in a creative purpose, not only to fix optical issues. For example, fisheye/de-fisheye, let or increase the distortion only on the edge… It is the reason why this feature is more appropriate to ViewPoint than to DPL.
• The profile’s editor should be able to fix more complex optics defects than those DPL can do with only the manual corrections, like moustache distortion, color shift, left-right inhomogeneity (centering defect), and maybe others.
• As an independent application, it could be applied on various kind of files, included the DNGs that are not recognized by DPL (e.g. DNG from smartphones).
• Into DPL, exifs data could be automatically read to propose the proper set of customized profiles, or to let selecting one in a library.